Pasture yield responses and nitrogen leaching losses from rolling downland grazed by sheep in the South Island of New Zealand

ABSTRACT A sheep grazing trial on rolling downland in East Otago was conducted from 2004 to 2007 to measure the effect of increasing rates of nitrogen (N) fertiliser on pasture yield and N leaching losses. For fertiliser rates ranging from 100 to 500 kg N/ha/yr, the efficiency of response averaged 20 kg DM/kg N and increased up to 300 kg N/ha/yr. Pasture yield averaged 12,680 kg DM/ha/yr in the control plots and peaked at 21,000 kg DM/ha/yr at 300 kg N/ha/yr. Clover content was significantly depressed by N use, declining from approximately 15% for the control to 2% when 200 kg N/ha/yr or more was applied. Leaching losses of 8–30 kg N/ha/yr at 100 and 200 kg N/ha/yr measured using mini-lysimeters were only slightly more than the control but increased up to 116 kg N/ha/yr at 500 kg N/ha/yr. The results from this site suggested that up to 100–200 kg N/ha/yr can be applied to produce more pasture on rolling downland grazed by sheep with only a small increase in N leaching losses.

• Publication year

  2023

• Venue

  New Zealand Journal of Agricultural Research

• Publication date

  2023-03-15

• Fields of study

  Not labeled

• Identifiers
  DOI 10.1080/00288233.2023.2186438
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

• Nitrogen fertiliser application rates and nitrogen leaching in intensively managed sheep grazed hill country pastures in New Zealand

  2017influential reference
• Innovations behind the farm gate that will influence performance of hill farming

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  2009influential reference
• Pasture production gains from strategic winter nitrogen applications on a North Island sheep and beef hill country farm

  2008influential reference
• The impacts of nitrogen fertilisation and increased stocking rate on pasture yield, soil physical condition and nutrient losses in drainage from a cattle‐grazed pasture

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• EFFECTS OF LATE-AUTUMN NITROGEN APPLICATION ON HILL COUNTRY PASTURES AND SHEEP PRODUCTION

  1986cited by this paper
• Sources of error in advisory soil tests

  1966cited by this paper
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  year unknowninfluential reference

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  2024cites this paper